i thought the enslavement of the natives didnt start until after the plagues hit the americas the europeans were initinally looking for tradeconnections and then found a continent with people when they returned again the populations of the continent had been brought back to almost nothing incentivizing the europeans to do everything they shouldnt have done but did besides werent it the mongols that brought it to europe it was a sideeffect of their conquest i dont know why you think that what the europeans did was something so different than what the mongols did